Abstract: Systems, apparatus, devices, and methods for converting electrical signals into sound using an acoustic transducer. The inventive acoustic transducer utilizes the motion of an airfoil shaped element to generate a sound wave, with the airfoil element being driven in response to an electrical signal input to a suitable driving element. In some embodiments, the airfoil element or elements act to mechanically couple the motion of an armature attached to the driver to the surrounding air, producing sound waves in a more efficient manner than typical acoustic transducer devices. Embodiments of the invention may be used in the design of loudspeakers, earpieces, headphones, and other devices for which a high efficiency transducer is desired.

Abstract: Techniques associated with amplifying orientation changes for enhanced motion detection by a motion sensor are described, including structures configured to enhance detection of motion, the structure having an articulator configured to amplify a motion and a pin configured to apply a force on a pivot point on the articulator, a motion sensor coupled to the structure and configured to detect motion of the structure, and circuitry configured to translate data associated with rotational motion of the articulator into a movement of an adjacent surface. In some embodiments, a method includes coupling a motion sensor to a skin surface using an articulator, the articulator configured to rotate in multiple planes, detecting rotational motion of the articulator using the motion sensor, and deriving data associated with movement on the skin surface.